There is no way of redoing events. No going back and erasing and "improving" history. And, I am afraid, no Golden Age, no Garden of Eden, when and where life was wonderful for everyone. Never happened.
Pick an era and there were winners and losers, the big difference being that, in the United States, the pool of "winners" as a percentage of the population, had been growing since the middle of the 20th century. The growth was not easy, nor was admittance to the "winning" side given, nor guaranteed to anyone. But the promise of full acceptance into society was not limited to Horatio Alger myth, nor legacy. You did not have to be of the right color, or the correct last name or bank account. Right now, that pool of possible winners is shrinking. People are angry and scared, and because a few years ago everything seemed brighter than today, there is a much angry talk (and looking for blame), about bringing back "the good old days."
You can't. I can't. Even if we could agree on when those days were.
There is no back button, no time machine, no Tardis, we can only go forwards.
Where are we going?